345 +298

568 +399

386 +297

546 +399

748 +198

427 +395

865 +799

768 +497

300+345=645-2=643

567+400=967-1=966 You don't need to subtract 1 because you moved one from 568 to 399.

400+546=946-1=945

550+400=950+5=955 you don't round 546 to 550

345 -298	568 -399	386 -297		546 -399		748 -198	427 -395	865 -799	768 -497		180 -90
											18-9=add 0
											you - 18 and 9 and get 9 if add 0 you get 90 so 90 is the answer for 180 - 90 = 90.

Change the problem to make it easier to multiply. For example, you can multiply one number by two
if you multiply the other by 1/2. Try making your own and solving it in the top row.

16 x 5

28 x 5

24 x 5

148 x 5

248 x 50

128 x 50

468 x 500

5 x 48=240 5x100=500 500+240=740

400x500=200,000 500x68=3,400 200,000+3,400=234,000

you could times 468 by 5 and add the 0's later!

Multiply by Splitting

When one number of a multiplication pair has two digits, try splitting that number into two parts by dividing it by 2.
Example: 9 x 12
Split 12 into two parts: 12=6x2
Instead of 9x12 (9x6x2) think 9 x 6 and then double it.
9x6=54 Double 54 and you get 108.

1. 8 x 16

2. 5 x 22

3. 6 x 18

4. 7 x 14

5. 9 x 16

6. 12 x 24